上海交通大学学报(医学版)

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热休克蛋白A12B对脂多糖诱导肺微血管内皮细胞损伤的影响

余桂芳1,2,张 旭1,朱科明1   

  1. 1.第二军医大学长海医院麻醉科, 上海 200433; 2.上海交通大学医学院附属第三人民医院麻醉科, 上海 201999
  • 出版日期:2014-07-28 发布日期:2014-08-11
  • 通讯作者: 朱科明, 电子信箱: kmzhu_md@yahoo.com.cn。
  • 作者简介:余桂芳(1980—), 女, 硕士, 主治医师; 电子信箱: 470147055@qq.com。

Effects of heat shock protein A12B on damage of mouse pulmonary microvascular endothelia cells induced by lipopo-lysaccharide

YU Gui-fang1,2, ZHANG Xu1, ZHU Ke-ming1   

  1. 1.Department of Anesthesiology, Changhai Hospital, Second Military Medical University, Shanghai 200433, China; 2.Department of Anesthesiology, the Third People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201999, China
  • Online:2014-07-28 Published:2014-08-11

摘要:

目的 探讨小鼠肺微血管内皮细胞(mPMVECs)热休克蛋白A12B (HSPA12B)表达下调对脂多糖(LPS)诱导的细胞炎症反应、迁移及超微结构改变的影响。方法 体外传代培养的mPMVECs分为LPS组(添加1 μg/mL LPS)、LPS+siRNA组[瞬时转染法将HSPA12B相应基因片段干扰小RNA (siRNA)寡核苷酸转入mPMVECs中,再加入1 μg/mL LPS)]和LPS+NC组[瞬时转染法将平行对照(NC)siRNA寡核苷酸转入mPMVECs中, 再加入1 μg/mL LPS]。对LPS+siRNA组和LPS+NC组,分别采用Transwell试验和细胞划痕实验观察细胞迁移情况;应用透射电子显微镜(透射电镜)观察mPMVECs超微结构改变;应用Real-Time PCR检测各组细胞中肿瘤坏死因子-α (TNF-α)、白介素-6(IL-6)、IL-10和IL-1β mRNA的表达。结果 与LPS+NC组比较,LPS+siRNA组mPMVECs的线粒体损伤加重,内质网水肿更明显;细胞内TNF-α、IL-6和IL-10 mRNA的表达显著上调 (P<0.05),而IL-1β表达下调,但差异无统计学意义(P>0.05);细胞迁移功能显著下降(P<0.05)。结论 下调HSPA12B表达后,mPMVECs经LPS刺激的炎症反应增强,细胞迁移功能下降。HSPA12B可能参与保护mPMVECs免受LPS侵袭的过程。

关键词: 热休克蛋白A12B, 脂多糖, 小鼠肺微血管内皮细胞

Abstract:

Objective To explore the effects of down-regulation of the expression of heat shock protein A12B (HSPA12B) of mouse pulmonary microvascular endothelia cells (mPMVECs) on the inflammatory reaction, migration, and ultrastructural changes induced by lipopolysaccharide (LPS). Methods The mPMVECs subcultured in vitro were divided into the LPS group (LPS of 1 μg/mL was added), LPS+siRNA group (siRNA oligonucleotides of relevant gene segments of HSPA12B were transiently transfected into mPMVECs and then LPS of 1 μg/mL was added), and LPS+NC group (siRNA oligonucleotides of negative controls were transiently transfected into mPMVECs and then LPS of 1 μg/mL was added). The migration of cells of the LPS+siRNA group and LPS+NC group was observed by the Transwell assay and wounding assay. The ultrastructural changes of mPMVECs were observed by the transmission electron microscopy. The expressions of TNF-α, IL-6, IL-10, and IL-1β mRNA of cells of each group were detected by the Real-Time PCR. Results Compared to the LPS+NC group, the mitochondrion damage of mPMVECs of the LPS+siRNA group was severer; the edema of endoplasmic reticulum was more significant; the expressions of TNF-α, IL-6, and IL-10 mRNA significantly up-regulated (P<0.05); the expression of IL-1β down-regulated, but the difference was not statistically significant (P>0.05); and the ability of cell migration was significantly decreased (P<0.05). Conclusion The inflammatory reaction of LPS-induced mPMVECs was enhanced and the cell migration was inhibited after HSPA12B was down-regulated. HSPA12B may be involved in the process of protecting mPMVECs from being invaded by LPS.

Key words: heat shock protein A12B, lipopolysaccharide, mouse pulmonary microvascular endothelia cells